Oven rack operating mechanism



Nov. 1, 1932. E. c. BAMBERG ET AL 1,885,404

OVEN RACK OPERATING MECHANISM Filed March 11, 1932 Fifi. l Q I /9 23 1 gv 9 z/ X I /0 70 2.5

- 24 25 5 5 2'0 6: 57 F a W /7 4' 4 /z 7 27 M 1 INVENTORS Edward C.Bamery By Law/@066 M y/ra ATTORNEY Patented Nov. 1, 1932 UNITED STATESPATENT OFFICE EDWARD C. IBAMBERG, OF 'IUJ'UNGA, AND LAWRENCE M. SYLVA,OF LOS ANGEIJES,

CALIFORNIA l OVEN RACK OPERATING MECHANISM Application filed. March 11}1932. Serial No. 598,194.

This invention relates to a device for sliding the racks of an oven toouter position on opening of the oven door and to inner position onclosure of the oven door. Heretofore,

door operated mechanisms have been proposed for drawing out the shelvesor grates of an oven on opening of an oven door. Such mechanisms haveinvolved some of the following features: special shelf structures; al-

teration of parts of the oven; or mutilation of oven parts. 1

It is the primary object of our invention to provide mechanism for thepurpose described which may be applied to conventional oven and rackstructures without mutilation or alteration of parts. It is also anobject of this. invention to provide a mechanism of the characterdescribed having any or all of the following features: v

A coupling bar movable forwardly and backwardly with the opening andclosing of x the oven door and so constructed that racks may beselectively coupled thereto; a com- 5 pact vmechanism in associationwith the coupling bar for projecting and retracting the latter; amechanism which will maintain the racks against tilting when in openposition; and a unit which may be installed in ovens.

These objects are accomplished by means of the embodiment of ourinvention illustrated in the accompanying drawing, in V which Fig. 1 isa vertical sectional view through an oven equipped with our improvedrack operating mechanism and the oven door open;

Fig. 2 is a sectional view similar to Fig. 1

showing the door closed; Fig. 3 is a side elevation of the couplingbaron an enlarged scale with fragments ofracks, a portion of the keeperbarbeing broken away to betterv show the construction Fig. 4 is a frontelevation of the coupling bar partially shown in section; Fig. 5 is asection as seen on the line 5-5 of Fig. 1.

Referring with moreparticularity to the drawing, an oven of a stove orrange is denoted by 6. The oven is provided with a swinging door 7 andhas rails 8 on its side 59 wall for slidably receiving oven racks 9. The

rollers sliding in the channel of slideway 11. 60

The front end of arm 15 is pivotally secured at 16 to a coupling bar 17.The coupling bar has a slot 18 for slidably receiving a pin on the frontend of arm 14 to provide for easy movement of the coupling bar, rollers19Iare provided at the top and bottom to engage the upper and lowerwalls of the oven. The bar 17 has recesses 20 disposed for alinementwith racks. Elongated openings 21 are formed at the top and bottom ofthe coupling bar. A keeper bar 22 is slidably secured for limitedmovement to the coupling bar by means of pins 23 mounted in slots 21. Inthe keeper bar are angled slots 24. The range of movement of the keeperbar is such that the mouths of recesses 20 and 24 may be registered byelevating the keeper from the position shown in Figs. 3 and 4. Thekeeper will by its own weight move to the position shown in Figs. 3 and4 such that the mouths of the recesses are out of register, and in suchposition the coupling bar holds the rear ends of the racks so they willnot tilt.

-The structure is of such a character that when collapsed it occupieslittle space at the rear of the oven. The amount of expansion of thelazy tongs may be adjusted by proper positioning of the bracket 27 withrespect to the hinge axis of the door.

What we claim is 1. A unit adapted to be used with an oven having adoor, rails for racks and racks slidabl mounted on the rails; comprisingan uprig t coupling bar for selective engagement with the racks; a lazytongs having at its front an arm pivotally connected to sald couplingbar and a companion arm slidably connected to said coupling bar, a plateadapted to be secured at the back wall of the oven, the arms at the rearend of said lazy tongs being pivotally and slidably connected to saidplate inversely in relation to the front connections, and an operatingrod secured to one of the arms of said lazy tongs and adapted to besecured to said door so as to be moved back and forth with opening andclosing of said door.

- 2. A unit adapted to be used with an oven having a door, rails forracks and racks slidably mounted on the rails; comprising an uprightcoupling bar having recesses facing and in alinement with said racks, akeeper slidably mounted on said coupling bar having angled recesses withmouths for registration with the recesses in said coupling bar andwhereby in one position of said keeper bar the mouths of the recesses insaid coupling bar will be closed; a lazy tongs having at its front anarm pivotally connected to said coupling bar and a companion armslidably connected to said coupling bar, a plate adapted to be securedat the back wall of the oven, the arms at the rear end of said lazytongs being pivotally and slidably connected to said plate inversely inrelation to the front connections, and an operating rod secured to oneof the arms of said lazy tongs and adapted to be secured to said door soas to be moved back and forth with opening and closing of said oor.

3. In combination with an oven having a door, rails for racks and racksslidably mounted on the rails; an upright coupling bar having recessesfacing and in alinement with said racks for selectively engaging racks;a lazy tongs having at its front an arm pivotally connected to saidcoupling bar and a companion arm slidably connected to said couplingbar, the arms at the rear end of said lazy tongs being pivotally andslidably connected to the rear of the oven inversely in relation to thefront connections, and an operating rod secured to one of the arms ofsaid lazy tongs and actuated by said door whereby said coupling bar willbe moved back and forth with opening and closing of said door.

4. In combination with an oven having a door, rails for racks and racksslidably mounted on the rails; an upright coupling bar having recessesfacing and in alinement with said racks for selectively engaging racks;a lazy tongs having at its front arm pivotally connected to saidcoupling bar and a companion arm slidably connected to said couplingbar, a plate adapted to be secured atthe back wall of the oven, the armsat the rear end of said lazy tongs being pivotally and slidablyconnected to said plate inversely in relation to the front connections,and an operating rod secured to one of the arms of said lazy tongs andactuated by said door whereby said coupling bar will be moved back andforth with opening and closing of said door.

5. In combination with an oven having a door, rails for racks and racksslidably mounted on the rails; an upright coupling bar having recessesfacing and in alinement with said racks for selective engagement withsaid racks, a keeper slidably mounted on said coupling bar having angledrecesses with mouths for registration with the recesses in said couplingbar and whereby'in one position of said'keeper bar the mouths of the recesses in said coupling bar will be closed; a lazy tongs having at itsfront an arm pivotally connected tosaid coupling bar and a companion armslidably connected to said coupling bar, the arms at the rear end ofsaid lazy tongs being pivotally and slidably connected to the rear ofthe oven inversely in relation to the front connections, and anoperating rod secured to one of the arms of said lazy tongs and actuatedby said door whereby said coupling bar will be moved back and .forthwith opening and closing of said door.

6. In combination with an oven having a door, rails for racks and racksslidably mounted on the rails; an upright coupling bar having recessesfacing and in alinement with said racks for selective engagement withsaid racks, a keeper slidably mounted on said coupling bar having angledrecesses with mouths for'registration with the recesses in said couplingbarand whereby in one position of said keeper bar the mouths of therecesses in said coupling bar will be closed; a lazy tongs having at itsfront an arm pivotally connected to said coupling bar and a companionarm slidably connected to said coupling bar, a plate'adapted to besecured at the back wall of the oven, the arms at the rear end of saidlazy tongs being pivotally and slidably connected to said plateinversely in relation to the front connections, and an operating rodsecured to one of the arms of said lazy tongs and actuated by said doorwhereby said coupling bar will be moved back and forth with opening andclosing of said door.

In witness that we claim the foregoing we have hereunto subscribed ournames this 5th day of March, 1932.

EDWARD C. BAMBERG. LAWRENCE M. SYLVA.

